You need at least two numbers to find a GCF, whichever method you use.
Whatever method you use, you can't find the GCF of one number. You need at least two.
It is: 69
It is 26
It is: 4
It is: 4
It is: 8
It is: 1
It is: 4
It is: 4
41 is a prime number which makes 41 the gcf of 41 and 82
You need at least two numbers to find a GCF no matter what method you use.